Discusses some of the more fruitful approaches to the use of high coercivity/high remanence magnet materials in magnetic circuit design and how the application of comparatively few and simple techniques can result in a large number of useful devices. The approaches discussed are the estimation of permeances, magnetic cladding, equivalent pole densities and current sheets, analytic application of Maxwell's equations, the magnetic moment rotation theorem and magnetic mirrors. Some novel devices resulting from these applications are cited. >